Ionia Weather Forecast

    • 65
    • 81

    Chance Thunderstorms

    • 65
    • 84

    Rain Showers

    • 62
    • 78

    Rain Showers

    • 60
    • 74

    Rain Showers Likely

    • 60
    • 78

    Slight Chance Thunderstorms

    • 63
    • 82

    Partly Sunny

Today 26 Jul Ontario

Partly sunny. A chance of Showers and Thunderstorms in the afternoon. Highs Ranging from the mid 70s on the Hilltops to the lower 80s across the lower Elevations. Light Winds. Chance of rain 30 percent.

Tonight 26 Jul Ontario

Mostly cloudy. Lows in the mid 60s. Light southwest Winds.

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  • Temperature Real-Time

Ionia Temperature Statistics

July Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 23 July, 2026

    48.9 °F

  • Average July

    73.4 °F

  • Highest 1 July, 2026

    94.6 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.5 °F
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